See that's what i thought...but check this...

My 360 died a couple weeks ago....when i originally bought my 360 i purchased 2 of them. Mine i bought the warranty and the other one i didnt. Well when i shipped the extra one out. I accidently sent the one that i bought the warranty for. :doh: So i went to best buy and told them that the 360 isn't working....I showed them the receipt and they went and gave me a new one....they didn't even check the serial...they just got a new one and gave it to me